Abstract
In order to ascertain how the structure and properties of recent high tenacity rayons had advanced, the change of the fine structure from super-2 type to super-3 type high tenacity rayon was examined based on the concept of the network structure.
The results obtained were as follows:
1. The crystallites, anchoring points of network structure, and the degree of crystallity became smaller, crystallite (plane) orientation became higher and the peaks of lateral order distribution curve shifted to lower order region for super-3 than those for super-2.
2. The molecular chain orientation in amorphous region became lower, and DP, degree of chain penetration through crystallites, and degree of uniformity of chainlengths between crystallites became higher, and network structure of super-3 became denser than that of super-2
